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Doping Polymer Semiconductors by Organic Salts: Toward High-Performance Solution-Processed Organic Field-Effect
Yuanyuan Hu1,2, Zachary D Rengert1, Caitlin McDowell1
1Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry , University of California at Santa Barbara , Santa Barbara , California 93106 , United States.
ACS Nano
|April 10, 2018
Summary
Adding organic salts like trityl tetrakis(pentafluorophenyl)borate (TrTPFB) to organic semiconductors significantly boosts the performance of organic field-effect transistors (OFETs). This doping method enhances charge transport and is adaptable for both p- and n-type doping in organic electronics.
Area of Science:
- Materials Science
- Organic Electronics
- Semiconductor Physics
Background:
- Organic field-effect transistors (OFETs) are key components in flexible electronics.
- Improving charge carrier mobility and device performance in OFETs remains a critical research area.
- Solution-processed semiconductors offer advantages for large-scale, low-cost manufacturing.
Purpose of the Study:
- To investigate the effect of incorporating an organic salt, trityl tetrakis(pentafluorophenyl)borate (TrTPFB), into donor-acceptor copolymer semiconductors for OFET fabrication.
- To understand the doping mechanism and efficiency of TrTPFB in organic semiconductors.
- To explore the structure-property relationships governing the performance enhancement in doped OFETs.
Main Methods:
- Fabrication of solution-processed OFETs using thin films of donor-acceptor copolymers.
- Addition of TrTPFB organic salt during the thin film processing.
- Electrical characterization (e.g., current-voltage measurements) to assess device performance.
- Structural characterization techniques to analyze film morphology and doping effects.
- Investigation of both p-type and n-type doping using different organic salts.
Main Results:
- Significant enhancement in OFET performance upon incorporation of TrTPFB.
- Confirmation of TrTPFB acting as a p-dopant for the organic semiconductors.
- Detailed understanding of doping efficiency and doping physics.
- Correlation between doping-induced structural changes and improved electrical characteristics.
- Demonstration of the versatility of organic salt doping for both p- and n-type semiconductors.
Conclusions:
- Organic salt doping is an effective strategy to enhance the performance of solution-processed OFETs.
- TrTPFB doping improves charge transport properties in donor-acceptor copolymers.
- This doping approach is versatile and applicable for creating high-performance organic complementary circuits.
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